From: The effect of children on female labor force participation in urban Iran
 | 1 + sample | 2 + sample | 3 + sample | |||
---|---|---|---|---|---|---|
 | Fraction of sample | Fraction that had a 2nd child | Fraction of sample | Fraction that had a third child | Fraction of sample | Fraction that had a 4th child |
(1) firstborn son | 51.3% | 0.790 | 51.0% | 0.603 | 50.6% | 0.559 |
 |  | (0.002) |  | (0.003) |  | (0.004) |
(2) firstborn daughter | 48.7% | 0.799 | 49.0% | 0.627 | 49.4% | 0.583 |
 |  | (0.002) |  | (0.003) |  | (0.004) |
Difference (1)-(2) |  | −0.009*** |  | −0.024*** |  | −0.024*** |
 |  | (0.003) |  | (0.004) |  | (0.005) |